The problem of calculating the energy release rate for crack growth in
an arbitrary composite in the presence of residual stresses is consid
ered. First, a general expression is given for arbitrary, mixed tracti
on, and displacement boundary conditions. This general result is then
applied to a series of specific problems including statistically homog
eneous composites under traction or displacement boundary conditions,
delamination of double cantilever beam specimens, and microcracking in
the transverse plies of laminates. In many examples, the energy relea
se rate in the presence of residual stresses can be reduced to finding
the effect of damage on the effective mechanical properties of the co
mposite. Because these effective properties can be evaluated by isothe
rmal stress analysis, the effect of residual stresses on the energy re
lease rate can be evaluated without recourse to any thermal elasticity
stress analyses.